Step 1 :Given data: sample size \(n = 226\), number of successes in the sample \(x = 209\), and hypothesized population proportion \(p_0 = 0.92\).
Step 2 :Calculate the sample proportion \(p = \frac{x}{n} = \frac{209}{226} = 0.9247787610619469\).
Step 3 :Calculate the test statistic \(Z = \frac{p - p_0}{\sqrt{\frac{p_0(1 - p_0)}{n}}} = \frac{0.9247787610619469 - 0.92}{\sqrt{\frac{0.92(1 - 0.92)}{226}}} = 0.26480771189405977\).
Step 4 :The test statistic is approximately 0.26, which is less than the critical value of 1.28. Therefore, we do not reject the null hypothesis. This means that the data does not provide strong evidence to support the manufacturer's claim that more than 92% of patients taking the drug are healed within 8 weeks.
Step 5 :Final Answer: \(\boxed{0.26}\)